Microwave Radiation Test - Anvil MWA1400 Service Manual

(TROUBLE 2) Oven does not operate at all ; Display window does not display any figures and
no input is accepted.
CONDITION
Check continuity
1. Fuse blows.
of monitor
switch (with
door closed).
Replace fuse
Check continuity
of primary
switch (with
door opened).
Disconnect one
side of the wire
lead connected
from transformer
to the high
voltage
capacitor and
operate the unit.
NOTE : All these switches must be replaced at the same time. Refer to page 5-6, 5-7
2. Fuse is not
Check latch and
tripping
hook when door
closed
CHECK RESULT
Continuity.
No continuity.
Continuity.
No continuity.
Normal.
Fuse blows again
OK
Not ok
17
CAUSE
Malfunction of the
monitor switch.
Shorted contact at
the primary switch.
Defective high
voltage capacitor.
Defective high volt-
age transformer.
Main PCB defective
Latch board back off
22
REMEDY
Replace primary
and monitor
switches.
Replace primary
and monitor
switches.
Replace high
voltage capacitor.
Replace high volt-
age transformer.
Replace PCB
Forward latch board